Calendar not Appearing on Page

Hello,
First of all, thank you for creating this beautiful plugin.

I have WordPress 3.5.1 and All in One Calendar Version 1.9.6-standard. The theme is “Fresco” from ThemeForest. After installing your plug-in’s latest release, its performances have been getting worse. The page where the calendar is hosted (Posterboard mode) shows the events several seconds after loading the page. The number of seconds has always been variable, from 4 to 15. Starting today though, the events don’t appear at all. I checked-out the Skip in_the_loop() option, but it doesn’t bring any result. Interestingly, the widget instead shows the event without any delay.

Thank you.

http://wordpress.org/extend/plugins/all-in-one-event-calendar/